Fix build

Author: fontanf

CMakeLists.txt

@@ -4,11 +4,12 @@ project(PackingSolver LANGUAGES CXX)
 
 # Solver options.
 option(PACKINGSOLVER_USE_CLP "Use CLP" ON)
+option(PACKINGSOLVER_USE_HIGHS "Use HiGHS" ON)
 option(PACKINGSOLVER_USE_KNITRO "Use Knitro" OFF)
 
 # Build options.
 option(PACKINGSOLVER_BUILD_MAIN "Build main" ON)
-option(PACKINGSOLVER_BUILD_TEST "Build the unit tests" ON)
+option(PACKINGSOLVER_BUILD_TEST "Build unit tests" ON)
 
 # Avoid FetchContent warning.
 cmake_policy(SET CMP0135 NEW)